Programmed 1998 Grand Prix PCM 16236757 | Flashed to Your VIN

Restore Peak Performance to Your GM Vehicle

Is your 1998 Pontiac Grand Prix or other GM vehicle suffering from frustrating issues like stalling, erratic shifting, poor fuel economy, or a persistent Check Engine Light? These are classic signs that the brain of your engine—the Powertrain Control Module (PCM)—is failing. Don’t let a faulty computer keep you off the road. This replacement PCM, part number 16236757, is the reliable, straightforward solution you’ve been looking for.

For over 20 years, I’ve seen countless drivers spend a fortune chasing symptoms, replacing sensors and parts, only to find the root cause was the PCM all along. A failing module can send incorrect signals to the engine and transmission, leading to a cascade of problems that are difficult to diagnose. This module isn’t just a replacement part; it’s a restoration of your vehicle’s core operational logic. We take the guesswork and extra cost out of the equation by programming the module specifically for your car using your Vehicle Identification Number (VIN). This ensures it has the latest GM software updates for optimal performance and compatibility, making the installation process as simple as possible.

A Straightforward Guide to Installation

1. ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
2. ✔ Locate the PCM: On most of these vehicles, the PCM is located in the engine bay, often inside the air filter box housing for protection. Consult a vehicle-specific repair manual if you’re unsure.
3. ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors have locking tabs that need to be released before pulling. Avoid forcing them.
4. ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket.
5. ✔ Install the New PCM: Mount your new, pre-programmed PCM securely onto the bracket.
6. ✔ Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
7. ✔ Perform Security Relearn: Your vehicle may require a security relearn procedure to recognize the new PCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This allows the anti-theft system to sync with the new module.

Is Your Vehicle Showing These Symptoms?

A failing computer can cause a wide range of issues. If you’re experiencing any of the following, a faulty PCM could be the culprit:

• ✔ Check Engine Light is on with codes related to internal module failure (e.g., P0601, P0605, P0606).
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained drops in fuel efficiency.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Intermittent stalling or rough idling.
• ✔ Communication errors with diagnostic scan tools.
• ✔ The vehicle fails an emissions test.

Verified Vehicle Compatibility

This module is a direct-fit replacement for a wide range of GM vehicles. Please confirm your vehicle is on this list. This part replaces service numbers: 09356741, 16236757, 9357034, 9357440, and 9366314.